EP 0886039 A1 19981223 - Process and system for eliminating nitrogen oxides out of exhaust gases, using a heat exchanger
Title (en)
Process and system for eliminating nitrogen oxides out of exhaust gases, using a heat exchanger
Title (de)
Verfahren und Einrichtung zum Entfernen von Stickstoffoxiden aus Abgasen mittels eines Wärmetauschers
Title (fr)
Procédé et ensemble d'élimination des oxydes d'azote présents dans des gaz d'échappement, utilisant un echangeur thermique
Publication
Application
Priority
FR 9707555 A 19970616
Abstract (en)
An apparatus for the elimination of nitrogen oxides (NOx) present in exhaust gases from an IC engine (1), incorporated in the exhaust line (2) from the engine, comprises a device for the conversion of NOx and a heat exchanger (4) situated in a shunt circuit (5) placed up-stream of the convertor (3), for cooling the exhaust gases. The convertor comprises several catalysts (3) arranged in the main exhaust line (2). The catalysts have disconnected temperature ranges over which the conversion of NOx is lower than a determined threshold (Cmin). A valve (6) is situated at the opening of the shunt line (5) to distribute the gas flow between the shunt line (5) and the main line (2) so that the exhaust gases pass over the catalysts at a temperature where at least one of the catalysts is active. Also claimed is a process for the elimination of the oxides.
IPC 1-7
IPC 8 full level
F01N 3/02 (2006.01); F01N 3/08 (2006.01); F01N 3/20 (2006.01); F01N 3/24 (2006.01); F01N 3/28 (2006.01)
CPC (source: EP US)
F01N 3/02 (2013.01 - EP US); F01N 3/0205 (2013.01 - EP US); F01N 3/2046 (2013.01 - EP US); F01N 3/2066 (2013.01 - EP US); F01N 3/2882 (2013.01 - EP US); F01N 2240/02 (2013.01 - EP US); F01N 2410/00 (2013.01 - EP US); F01N 2570/14 (2013.01 - EP US); F01N 2610/03 (2013.01 - EP US); Y02A 50/20 (2017.12 - EP US); Y02T 10/12 (2013.01 - EP US)
Citation (search report)
- [AD] US 3716344 A 19730213 - ASHBURN D
- [A] DE 3439998 A1 19850919 - AUDI AG [DE]
- [AD] DE 4410022 A1 19951005 - SIEMENS AG [DE]
- [A] US 5201802 A 19930413 - HIROTA SHINYA [JP], et al
- [A] GB 1159061 A 19690723 - WALKER BROOKS [US]
- [A] PATENT ABSTRACTS OF JAPAN vol. 017, no. 346 (M - 1437) 30 June 1993 (1993-06-30)
Designated contracting state (EPC)
DE ES GB IT SE
DOCDB simple family (publication)
EP 0886039 A1 19981223; EP 0886039 B1 20011031; DE 69802235 D1 20011206; DE 69802235 T2 20020516; ES 2167052 T3 20020501; FR 2764638 A1 19981218; FR 2764638 B1 19990813; JP H1122452 A 19990126; US 6009703 A 20000104
DOCDB simple family (application)
EP 98401204 A 19980519; DE 69802235 T 19980519; ES 98401204 T 19980519; FR 9707555 A 19970616; JP 16853598 A 19980616; US 9463398 A 19980615